Find magnitude of the magnetic field by wire at the ground

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Reference no: EM13246585

A power line, running above the ground at the top of 8.0 m high poles, carries a current of 90 A. What is the magnitude of the magnetic field produced by this wire at the ground?

How does this compare with the Earth's field of about 1/2 G?

What is the current if the length of the poles remains the same when creating a magnetic field that is 9% of the Earth's field?

Reference no: EM13246585

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